This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 9 |
| 6 | 22 |
| 7 | 40 |
| 8 | 100 |
| 9 | 225 |
| 10 | 582 |
| 11 | 1464 |
| 12 | 3960 |
| 13 | 10585 |
| 14 | 29252 |
| 15 | 80819 |
| 16 | 226530 |
| 17 | 636321 |
| 18 | 1800562 |
| 19 | 5107480 |
| 20 | 14548946 |
| 21 | 41538916 |
| 22 | 118929384 |
| 23 | 341187048 |
| 24 | 980842804 |
| 25 | 2824561089 |
| 26 | 8147557742 |
| 27 | 23536592235 |
| 28 | 68087343148 |
| 29 | 197216119545 |
| 30 | 571924754778 |
| 31 | 1660419530056 |
| 32 | 4825588205920 |